Here is the full list of all 13 LIMINAL PHASE achievements.
Get a stolen goods high score of at least 2214.
Unveil the secret plaques.
Collect all four 1.44MB black floppy disks.
Collect the secret symbols.
Don’t die during a single playthrough.
Enter the Cool S area.
Unlock the red doors.
Terminate the BCOD.
Touch the base of the world.
Set Feeshman free.
Get a stolen goods high score of at least 512.
Open E. Wood’s locker.
Walk on water.